Stay-bolt structure



J. R. FLANNERY AND E. I. DODDS.

STAY -BOLT STRUCIURE.

APPLICATION man FEB.16, 1.921.

Patented Jan. 17,1922.

mmm s UhllTED STA'lLSiil'ENT G? EDI-IN ROGERS FLANNERY, OF ZIITQQBUEGH,PENNSYLVANIA,

AND nrnnn I. non- OF CENTRAL VALLEY, NEW YGRK, ASSIGNGHS TO FLANNEPYSCI/l COMPANY. OF

I PITTSBURGH, 'PENNSYLVILNEA.

sear-note srn'ocrunn.

Application filed February T0 all wkoiiz may concern;

Be it known that we, don}? Roi-inns FLA Km; and Erna 1. Bonus, citizensoi the lnited States. andresidents 0t Pittsbur h and Central Valley, inthe counties oi Allegheny and Orange and States of Pensylvania and NewYork respectively, have invented certain new. and useful Improvements inStay-bolt Structures; and do hereby declare the following to be a full,clear and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to improvement in staybolt structure, the objectbeing to provide improved means for mounting the stay bolt head in theouter sheet of the boiler whereby the bearing member for the bolt headmay have a limited universal movement on its seat and the stay bolt havea universal movement in its bearing member, and it consists in the partsand combination of parts as will be more fully explained and pointed outin the cla'nns.

In the accompanying drawings; Figure is a view in section of ourimprovement and Figure 2 is a similar view of a modification thereof. 7

5 represents the outer sheet of aboiler having a bolt opening therein,the walls of said opening being preferably formed in the arc of a circleand widest at the top, and 6 is a bolt bearing member semi-spherical inshape and mounted within the said bolt opening, the outer end of thebolt bearing member terminating intermediate the inner and outersurfaces of the sheet 5.

The bearing member 6 is provided with a rounded or curved seat for thehead 7 01" the bolt 8, which latter is secured at its inner end (notshown) to the inner sheet of the boiler in the usual and well knownmanner. The outer face ofthe bearing member conforms in shape anddiameter to the lower portion of the bolt opening in the sheet 5 so thatit may have a universal movement therein whereby the bolt may be set atright angles or oblique to the plates and that the long axis of the boltbearing member be parallel or coincident with the long axis of the bolt.The bolt bearing member is held in place against outward displacement,but free to have a limited universal movement,

6, 1921. Serial if: the collar 9 which latter win at 10 to the sheet 5.The inner ed e collar is removed or separated li t distance from theouter or larger end of t bolt bearing member 5 so as to permi of limiteduniversal movement of the l and it is threaded internallv to engage thethreaded cap 11 and also pi'ovided with an internally projecting seat orflange 12 carrying a gasket 13 on which the cap ll ats to .form a steamtight joint.

lVith this construction it will be seen that the bearing member 6 whileheld a 'ns i outward displacement by the collar 9. is free at all timesto move with the bolt 8 or independently of the latter to accommodateitself to the movement of the bolt or the boiler sheets connected by thebolt, and by removing the cap 11 the bolt head will. be exposed fortesting the bolt.

In the construction shown in Figure 2 the collar 9 which is theequivalent G1: the collar :9 of Figure l is a built up structure formedby welding a weldin compound or mixture directly to the sheet 0 and isinitially separated from the bolt bearing membeubv the disk or ring 14which is made of material that will be dissolved by steam or water thattter the parts have been assembled it will dissolved or disintegratedthus leaving the bolt bearing member tree for universal movement to alimited extent, as in the construction shown in Figure 1. In forming thebuilt up collar 9 which is formed of welding material, a suitable coreis used which be withdrawn or broken up after the built up collar 9" hasbeen formed. Q collar has been formed it may be counterbored itnecessary and threaded at its outer end to receive the threaded cap 11,which as in the former instance is seated on a seat or flange so as toform a steam tight joint.

In both structures space is left between the bearing member and cap forthe longitudinal movement of the bolt, and in both instances the capforms an abutment for the bolt head and takes all stresses due to acollapsing movement of the sheets.

It is evident that many slight changes might be resorted to in therelative arrangement of parts shown and described without departing fromthe spirit and scope of our invention hence we would have it understoodthat we do not wish to confine ourselves to the exact construction andarrangement of parts shown and described but,

Having fully described our invention what We claim as new and desire tosecure by Letters-Patent is 1. In a stay bolt structure, the combinationof a boiler sheet having a bolt opening therein, a bolt bearing membermounted in said opening'to have a universal turning movement therein,and means secured to the outer sheet and removed from the bearing memberto permit of and limit the universal turning movement of the latter.

2. In a stay bolt structure, the combination of a boiler sheet having abolt opening therein, a bolt bearing member mounted for universalmovement in said opening, and a collar permanently secured to the sheetand forming a stop for limiting the movement of the bolt bearing member.

3. In a stay bolt structure, the combination of a boiler sheet having abolt opening therein, a bolt bearing member mounted for universalmovement in said opening, a

threaded collar permanently secured to the sheet and forming a stop forlimiting the movement'of the bolt bearing member and a threaded capdetachably secured to said, threaded collar. l

4:. In a stay bolt structure, the combination of a boiler sheet havingbolt opening therein, a bolt; bearing member mounted for universalmovement in said opening, an internally threaded collar Welded withintheopening at the outer sideof the bearing member and spaced therefrom topermit a limited universal movement of said member, the said threadedcollar provided With an annular seat and a threaded cap adapted to bedetachably secured to the said collar and rest on the annular seat onthe same.

In testimony whereof, We have signed this specification in the presenceof a sub scribing Witness. I

JOHN ROGER-S FLANNERY. ETHANI. DODDS. 1 Witness: Y 7

EDWIN SPENCER RYCE.

